Support my plugin in fn plugin for RD style

RD style expands

    ((-((<20130714>))-))

to

    <%= fn <<-'0000random_id1111'
    <%=my "20130714","20130714"%>
    0000random_id1111
    %>

"%>" in "<%= ... %>" confuses ERB:

    % echo '<%= eval("<= 1 + 1 %>") %>' | erb -x
    #coding:ASCII-8BIT
    _erbout = ''; _erbout.concat(( eval("<= 1 + 1 ).to_s); _erbout.concat "\") %>\n"
    ; _erbout.force_encoding(__ENCODING__)

'eval("<%= 1 + 1 )...' is broken.

So "%>" should be escaped as "%%>".
use fastimage instead of imagesize
Merge pull request #331 from kou/rd-style-support-my-in-fn

Support my plugin in fn plugin for RD style
use https
added snapshot to suffix
rewrite to packaging task:

 * remove unnecessary comments.
 * remove file task, they is removed fetch task.
 * integrate package tasks stable and snapshot.
increase depth number, because sometimes can't get latest tag
integrate rack class when running cgi mode
update send_body to latest Rack::Handler::CGI version
remvoe Gemfile.cgi, it works with Rack now
to use Rack::Handler::CGI.send_body instead of stolen method
Content-Type is moved to dispatcher
style
fixed broken settings for latest jasmine
added jasmine:ci task into travis-ci
rmeove sprockets from default gems
bundle update
only use assets routes when loading Sprockets
Sprockets is top-level definition
FastImage.new required image path